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The Influence of Adding Coarse Grain Phase on the Tribo-Wear Characteristics and Mechanical Properties of Ultra-Fine Grained Al-2Cu-B 4 C Trimodal Composite at Room Temperature
Transactions of the Indian Institute of Metals ( IF 1.5 ) Pub Date : 2020-06-16 , DOI: 10.1007/s12666-020-02012-9
Ali Alizadeh , Mohammad Maleki , Matin Saessi

In this paper, it is intended to analyze the influence of coarse grain (CG) phase on mechanical properties and wear performance of Al–2Cu-4 wt% B4C trimodal composite. Trimodal ultra-fine grained (UFG) composites with 30 and 50 wt% aluminum coarse grains (4-66-30) and (4-46-50) were prepared using powder metallurgy and hot extrusion. Wear tests were conducted for normal loads of 20 and 50 N at a sliding velocity of 0.6 m/s at room temperature. Results revealed that there was a direct relationship between the CG content and the plastic deformation of worn subsurface. Moreover, by adding 50 wt% CG, wear rate reached to around 0.02 × 10−3 (mm3/m) and plastic deformation increased significantly. Investigations on the microstructure indicated that wear mechanisms of the trimodal samples were a combination of abrasive, adhesive, and delamination wear in the tribological layer.



中文翻译:

添加粗晶相对室温下超细晶粒Al-2Cu-B 4 C三峰复合材料的摩擦磨损性能和力学性能的影响

本文旨在分析粗晶粒(CG)相对Al-2Cu-4 wt%B 4 C三峰复合材料的力学性能和磨损性能的影响。使用粉末冶金和热挤压制备具有30和50 wt%的铝粗晶粒(4-66-30)和(4-46-50)的三峰超细颗粒(UFG)复合材料。在室温下以0.6 m / s的滑动速度对20和50 N的正常载荷进行磨损测试。结果表明,CG含量与磨损的地下塑性变形之间存在直接关系。此外,通过添加50 wt%的CG,磨损率达到约0.02×10 -3(mm 3/ m),塑性变形显着增加。对微观结构的研究表明,三峰样品的磨损机理是摩擦层中磨料,粘合剂和分层磨损的组合。

更新日期:2020-06-16
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